已知函数
,若函数
有四个不同的零点
,则实数
的取值范围是________ ,设
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/871f6d4038d89a0252407a630614edfd.png)
________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ddb02adf7d7b3383b2af4424e8dbe0bc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b515c9627aa8fefb32173342f0a9a574.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e8ccd22fd0ca1a8e1468329284f91b6a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3604274ad6707a906eba371a9e884144.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/871f6d4038d89a0252407a630614edfd.png)
更新时间:2022-12-21 20:44:20
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解题方法
【推荐1】已知函数
则关于
的方程
的所有根的和的最大值是_______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b37e5be6271303970128469742383658.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e833de61e1e735b2943f41c62e6299cd.png)
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(0.65)
名校
【推荐2】函数
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3141867ee39d13c01afb6b169a587761.png)
______ ,若存在四个不同的实数a,b,c,d,使得
,则
的取值范围为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48270c2d0d283cc2ff7c13cb9675c58c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3141867ee39d13c01afb6b169a587761.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67afd34495f2c2c3fe2deec14e1b4b6c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/35893041a02be39c9d0c1e9b329556eb.png)
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适中
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【推荐1】下列几个命题:
(1)方程
有一个正实根,一个负实根,则
;
(2)函数
是偶函数,但不是奇函数;
(3)函数
的值域是
,则函数
的值域为
;
(4)一条曲线
和直线
的公共点个数是
,则
的值不可能是1.
其中正确的命题的序号有_______________ .
(1)方程
![](https://img.xkw.com/dksih/QBM/2012/8/1/1570948081418240/1570948086652928/STEM/833fb9bffec54e5e8bbe9afb70e7a6ec.png?resizew=133)
![](https://img.xkw.com/dksih/QBM/2012/8/1/1570948081418240/1570948086652928/STEM/6a398b67d88b450894a7e5c9bb434788.png?resizew=37)
(2)函数
![](https://img.xkw.com/dksih/QBM/2012/8/1/1570948081418240/1570948086652928/STEM/d9b9e34d0f8b4bf1a6cef85731c2a23e.png?resizew=143)
(3)函数
![](https://img.xkw.com/dksih/QBM/2012/8/1/1570948081418240/1570948086652928/STEM/0ba8a8e94c9543fda3f14620dbc21e59.png?resizew=36)
![](https://img.xkw.com/dksih/QBM/2012/8/1/1570948081418240/1570948086652928/STEM/0ed35d71c54a4055b187ec0b274e7567.png?resizew=44)
![](https://img.xkw.com/dksih/QBM/2012/8/1/1570948081418240/1570948086652928/STEM/e6f1a7c129b647eaa0a6e5bd1d4f4835.png?resizew=56)
![](https://img.xkw.com/dksih/QBM/2012/8/1/1570948081418240/1570948086652928/STEM/7aef57184bc346be9f3e556869b41058.png?resizew=41)
(4)一条曲线
![](https://img.xkw.com/dksih/QBM/2012/8/1/1570948081418240/1570948086652928/STEM/0d515b0a6f4d4cc6991f8b9977791b56.png?resizew=73)
![](https://img.xkw.com/dksih/QBM/2012/8/1/1570948081418240/1570948086652928/STEM/71be48f68c3f4d92bdff05cc03da0356.png?resizew=85)
![](https://img.xkw.com/dksih/QBM/2012/8/1/1570948081418240/1570948086652928/STEM/2cc296ee092846b18ae198c85bc5735f.png?resizew=17)
![](https://img.xkw.com/dksih/QBM/2012/8/1/1570948081418240/1570948086652928/STEM/2cc296ee092846b18ae198c85bc5735f.png?resizew=17)
其中正确的命题的序号有
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【推荐2】已知函数
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【推荐1】已知函数
,若方程
在
上有三个实根,则正实数
的取值范围为______________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/576dbcaaecfcc6ec06df5f0d05bb91f3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6864f84e5455a9bbc5759c8d4ef3a783.png)
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【推荐2】当
时,
.若函数
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【推荐1】已知函数
,某相邻两支图像与坐标轴分别交于点
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【推荐2】已知函数
,若存在互不相等的实数
满足
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,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ec27a3a0616fe2ac9092e8f4c711b96a.png)
___________ ;
的取值范围为___________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/31e76582ae4a8b78368bd142107449bd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/05b8ec9d4206ea66a02de5c4a1e1e911.png)
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